Clock-movement.



PATENTED MAY 21, 1907.

No. 854,518. G. T. MCGLINTOUK. CLOCK MOVEMENT. APPLICATION FILED JUNE12,1906.

THE nwkms PETERS ca., WASHINGTON, u. c.

UNITED STATES PATENT OFFICE.

CLOCK-MOVEMENT.

Specification of Letters Patent.

Patented May 21, 1907.

A li tio fil d June 12.1906. Serial No. 321,339.

To all whom it may concern:

Be it known that I, CnARLns TYLER Mc- CL1N'rocK, a citizen of the UnitedStates of America, residing at Oil City, in the county of Venango andState of Pennsylvania, have invented certain new and useful Improvementsin Clock-Movements, of which the following is a specification, referencebeing had therein to the accompanying drawing.

This invention relates to clock movements, and more particularly to animproved escapement device for clock movements.

The primary object of the present invention is to provide an escapementdev ce which will impart a positive vibration to a pendulum by a directcrank movement.

A further object of the invention is to provide an escapement of novelconstruction which will not be affected by ordinary shocks or jars, orby slight variations in the position of the clock casing.

The most common form of escapement known as the anchor escapementemploys a vibrating anchor provided with pallets to alternately engagethe teeth of the escapement wheel. This, like various other wellknownescapement devices requires that the clock should rest upon anabsolutely level support, and moreover, the toothed wheel, and palletsof the vibrating element of the escapement are sensitive to wear andfriction.

It is the aim of the present invention to entirely avoid the employmentof a toothed escapement wheel and a vibrating element having pallets toengage said wheel, and to substitute a positively reciprocating deviceacted upon by a positively-driven crank-pin.

The invention consists of an escapement device comprising a lever fixedto a pendulum shaft and having an elongated slot formed therein, and acrank-pin extending into said slot, and carried by a revoluble arborwhereby a positive vibration is imparted to said lever at eachrevolution of said arbor.

The specific construction of the improvement will be fully describedhereinafter in connection with the accompanying drawing which forms apart of this specification, and its features of novelty will be definedin the appended claims.

In the drawing, Figure 1 is a rear elevation. of a clock movement withmy improved escapement in position thereon, Fig. 2 is a side elevationof the same, Fig. 3 is a detail view of the escapement device removedfrom the clock movement, and Fig. 4 is a modification.

The reference numeral 1 designates the supporting frame of a clockmovement, and 2 the winding drum mounted within said frame. The drawingrepresents a movement adapted to be actuated by a cord and weight, butit will be understood that the improved escapement device constitutingthe invention, may be applied to any form of movement I have shown aclock train for revolving the escapement arbor 3 from the drum, saidtrain comprising a gear wheel 4 on the drum shaft, the usual arbors andintermeshing pinions and gearing on said arbors for transmitting rotarymotion to the arbor 3. It Will be understood that the clock train, andthe relative arrangement of the winding mechanism and the clock trainconstitute no part of the invention, and such parts are intended to beshown in the drawing only conventionally, and for the purpose of makingclear the operation of the improved escapement device.

Above the arbor 3 is the pendulum shalt 5 suitably supported in bearingsof the frame, and carrying the pendulum guide 6 embracing the pendulum7, the latter provided with the usual bob 8. The pendulum 7 is suspendedfrom a bracket 9 secured to the clock frame.

Mounted upon the front end of the arbor 3 is a disk 10 from the frontface of which pro jects a crank-pin 11, said pin projecting into anelongated slot 12 formed in the escapement lever 13, and disposedlongitudinally of said lover. The upper end. of the lever 13 is formedwith an eye 14 through which the pendulum shaft extends. The lever beingthus fixed upon the shaft, the required oscillating movement of theshaft 5 and the consequent vibration of the pendulum is effected by themovement of the crank-pin 11 within the slot 12 of the escapement lever.

From the illustration in Fig. 3 it will be apparent that at eachcomplete revolution of the disk 10 the escapement lever is given twoimpulses, in opposite directions, as indicated by full and dotted lines.These move ments or impulses of the lever are positive and therefore notaffected by any slight variation of the clock case and movement from alevel position. thus gives a positive oscillating movement Theconstruction I I O to the pendulum shaft as distinguished from plicationto a clock movement; nor to the specific form of crank deviceillustrated in the drawings. As a crank arm might be employed in lieu ofthe disk shown, I therefore, reserve the right to make all suchmodifications and variations in the details of construction andarrangement of parts as may be resorted to without departing from thescope of the invention as set forth in the claims.

What I claim and. desire to secure by Letters Patent, is

1. An escapement device, comprising an oscillating shaft, a vibratingmember carried. thereby, an escapement lever fixed on said shaft, andformed with a longitudinally disposed slot, a rotary shaft, a disk onsaid. rotary shaft, and a crank pin carried thereon and extending intosaid slot.

2. An escapement device comprising an oscillating shaft, a pendulumoperated there by, an escapement lever fixed upon said shaft, and formedwith. an elongated longitudinally disposed slot, a rotary shaft arrangedparallel with said oscillating shaft and a crank disk fixed to saidshaft, and provided with a projecting pin extending into the slot ofsaid lever.

23. An escapement device, comprising an oscillating shaft, a vibratingmember carried. thereby, an escapement lever fixed upon said shaft, andformed with a longitudinally disposed slot, a rotary shaft, a disk onsaid rotary shaft, a crank-pin carried on said disk extending into saidslot, and an anti-frictimr roller on said pin.

4. The combination with the clock train and escapement arbor of a clockmovement, of an escapement device comprising an oscillating shaft, apendulum operated thereby, an escapement lever fixed on said shaft andformed with a longitudinally disposed slot, a disk on said arbor and acrank-pin on said disk, and extending into said slot.

5. The combination with a clock train, of winding mechanism therefor, anescapement arbor driven by said train, a disk mounted on said arbor, acrank-pin projecting from said. disk, a shaft above said arbor, anescapement lever fixed upon said shaft, and formed with a longitudinallydisposed slot to receive said pin, and a pendulum and bob suspendedabove said shaft.

In testimony whereof I allix my signature in the presence of twowitnesses.

CHARLES TYLER. rlleCl/lN'lObh.

Witnesses E. R. SHEPARD. CHAS. H. IJAY, Jn.

